Hes right.
Some years ago I worked for a cable company (DOCIS)
We had customers that had these old thompson modem.
They had contracts that where a couple years old and relatively expensive for that day standards.
A few of them ran reverse engineered firmware.
Basically they removed the speedlock that was built in the firmware.
The funny thing is we knew about it.
They company just let them because the outdated overpriced contract made sure they paid too much anyway.